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Abstract

A technique for time division multiplex (TDM) forwarding of data streams. The system uses a common switch fabric resource for TDM and packet switching. In operation, large packets or data streams are divided into smaller portions upon entering a switch. Each portion is assigned a high priority for transmission and a tracking header for tracking it through the switch. Prior to exiting the switch, the portions are reassembled into the data stream. Thus, the smaller portions are passed using a 'store-and-forward' technique. Because the portions are each assigned a high priority, the data stream is effectively 'cut-through' the switch. That is, the switch may still be receiving later portions of the stream while the switch is forwarding earlier portions of the stream. This technique of providing 'cut-through' using a store-and-forward switch mechanism reduces transmission delay and buffer over-runs that otherwise would occur in transmitting large packets or data streams.

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First Claim